<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<button id = "test">test</button>
	</body>
	<script src="js/common.js" type="text/javascript" charset="utf-8"></script>
	<script type="text/javascript">
		var btn = $("#test");
		function test(){
			alert(1);
		}
		eventUtils.add(btn,'click',test).remove(btn,'click',test).add(btn,'click',test);
	</script>
</html>
